The invention provides an ink cartridge and a printer. The ink cartridge is detachably arranged on a printer main machine and comprises a main body, a first hook part and a jacking part, the first hook part and the jacking part are arranged on the main body in a rotating mode respectively, the first hook part is used for being matched with a second hook part of the printer main machine, a slidewayis formed in the main body and is used for guiding the second hook part to move relative to the main body in the preset direction, when the ink cartridge is mounted, the first hook part rotates relative to the main body under the pushing action of the second hook part, so that the first hook part enters a locking state, and when the ink cartridge is dismounted, the jacking part abuts against thefirst hook part to rotate relative to the main body under the pushing action of the second hook part, so that the first hook part is changed from a locking state to an unlocking state. According to the ink cartridge and the printer, the structure principle is simple, the operation is easy, and then the dismounting difficulty of the ink cartridge is further lowered; and meanwhile, the occupied space of the structure is relatively small, and miniaturization and densification design of the ink cartridge and the printer is facilitated.